兔脓毒症早期心肌功能的变化

目的　研究脓毒症早期心肌功能变化的意义。方法　 2 0只兔随机分成两组 :对照组 ( n=10 )行盲肠探查术 ;脓毒症组 ( n=10 )行盲肠结扎加穿孔术 ( CL P)制备脓毒症模型。两组均经右侧颈内动脉插管至左心室 ,每隔 1h测量 1次左室收缩峰压 ( L VSP)、左室压力最大上升速率 ( dp/ dt max)、左室压力最大下降速率 ( dp/ dt m ax) ;并采血检测肌钙蛋白 I( Tn I) ,设术后 0、1、2、3和 4共 5个时间点。结果　脓毒症组动物CL P术后 1h即出现 L VSP、 dp/ dt max、 dp/ dt m ax较基础值均明显下降 ( P均 <0 .0 5 ) ,且随着时间的发展有进一步下降趋势 ;血清 Tn I水平均明显升高 ( P均 <0 .0 5 ) ,且随着时间的发展进一步升高。而对照组无明显变化。结论　兔脓毒症早期即有心肌损害 ,表现为心肌收缩和舒张功能均下降

Alterations in myocardial function in early stage of sepsis in rabbits

Objective To study the alterations in myocardial function in early stage of sepsis. Methods Twenty rabbits were randomly divided into two groups. In the control group ( n =10) only laparotomy was done, and in the sepsis group the animals received cecal ligation and puncture (CLP). In both groups left ventricular catheter was placed via right internal carotid artery. Left ventricular systolic peak pressure (LVSP), maximal positive change in filling pressure versus time ( dp/dt max), maximal negative change in filling pressure versus time (dp/dt max) were monitored, and serum troponin I (TnI) was measured per hour for five times(0, 1, 2, 3, 4 hours after operation). Results Compared to the basic levels, LVSP, dp/dt max and dp/dt max decreased significantly an hour after CLP in sepsis group(all P <0 05), with the tendency of decrease with elapse of time. Serum TnI increased significantly an hour after CLP in sepsis group, and continued to increase with the passage of time. In contrast, no significant change was observed in control group. Conclusion Cardiac muscle is injured, and myocardial systolic and diastolic functions are depressed in early stage of sepsis in rabbit model.